garis dengan persamaan ax+by =1 melalui titik (3,-2) dan (-5,4) nilai a dan b berturut turut adalah...

jawab
persmaan linier

ax + by = 1
(3, -2) --> 3a - 2b = 1.
(-5, 4) --> -5a + 4b = 1


3a - 2b = 1......||kali  2
- 5a + 4b = 1

6a - 4b = 2
-5a + 4b = 1 ....(+)
a = 3

3a- 2b = 1
3(3) - 2b = 1
9 - 2b = 1
- 2b = 1 - 9
-2b = - 8
b = 4

a,b = 3, 4